SSM实现mysql数据库账号密码密文登录功能

引言

      咱们公司从事的是信息安全涉密应用的一些项目研发一共有分为三步，相比较于一般公司和一般的项目,对于信息安全要求更加严格，领导要求数据量和用户的用户名及密码信息都必需是要密文配置和存储的，这就涉及到jdbc.properties文件中的数据库的用户名和密码也是一样的，需要配置问密文,在连接的时候再加载解密为明文进行数据库的连接操作，以下就是实现过程,一共有分为三步。

一、创建DESUtil类

提供自定义密钥，加密解密的方法。

package com.hzdy.DCAD.common.util;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import java.security.Key;
import java.security.SecureRandom;

public class DESUtil {
  private static Key key;
  //自己的密钥
  private static String KEY_STR = "mykey";
  static {
    try {
      KeyGenerator generator = KeyGenerator.getInstance("DES");
      SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
      secureRandom.setSeed(KEY_STR.getBytes());
      generator.init(secureRandom);
      key = generator.generateKey();
      generator = null;
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String getEncryptString(String str) {
    BASE64Encoder base64Encoder = new BASE64Encoder();
    try {
      byte[] strBytes = str.getBytes("UTF-8");
      Cipher cipher = Cipher.getInstance("DES");
      cipher.init(Cipher.ENCRYPT_MODE, key);
      byte[] encryptStrBytes = cipher.doFinal(strBytes);
      return base64Encoder.encode(encryptStrBytes);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String getDecryptString(String str) {
    BASE64Decoder base64Decoder = new BASE64Decoder();
    try {
      byte[] strBytes = base64Decoder.decodeBuffer(str);
      Cipher cipher = Cipher.getInstance("DES");
      cipher.init(Cipher.DECRYPT_MODE, key);
      byte[] encryptStrBytes = cipher.doFinal(strBytes);
      return new String(encryptStrBytes, "UTF-8");
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  public static void main(String[] args) {
    String name = "dbuser";
    String passWord = "waction2016";
    String encryname = getEncryptString(name);
    String encrypassword = getEncryptString(password);
    System.out.println("encryname : " + encryname);
    System.out.println("encrypassword : " + encrypassword);
    System.out.println("name : " + getDecryptString(encryname));
    System.out.println("password : " + getDecryptString(encrypassword));
  }
}